Heating and ventilating cabinet



Nov. 30 1926. 1,608,495 7 L. P. DWYER HEATING AND VENTILATING CABINET Filed Au ust 15. 1919 2 Sheets-Sheet 1 Fig.

INVENTOR.

ATTORNEY LRWRENQE 'PHRKER DWYER- Nov. 30 1926.

L. P. DWYER HEATING AND VENTILATING CABINET Filed August 1919 2 Sheets-Sheet 2 k 4, z 19 4: 1 l v M r H:

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INVENTOR. LHWRENCE PHRKER vw e A TTORNEY Patented Nov, 3, l@2ti.

I LAWRENCE PARKER, DWYER, F GHICAGU, ILLINOIS, ASSIGNOR T0 DWYEB EQUIP MEN?! COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION. OF ILLINUXS.

HEATING AND VENTILATING CABINET.

Application filed August 13, 1913. Serial No. 317,188.

5 provision of an improved apparatus designed for installation in a room as a fixture and adapted to function efiectively to heat the room by circulation of heated air therein, or to ventilate the room by the circulation therein of fresh air drawn from a suitable source of supply. v

More particular objects of the inventlon reside in the provision of an apparatus of the type described Which is of a compact and unitary construction in the nature'of a cabinet adapted for installation with facility, which may be manufactured and operated economically, and which possesses certain features of advantage whereby increased efliciency in its operation and maintenance is attained.

One of theparticular obj ectsof the inven-.

tion is the provision of an apparatus of the type above mentionedin which circulation of airisinduced by fans, the arrangement of'which ,is such asto produce a desired circulation ofheated or fresh'air with a. min1- mum expenditure of power and with minimum deterioration in the apparatus. Amore specific object embraces'the installation of two fans adaptedto discharge air' currents in opposite directions, the motor for driving the fans being removed from the path of the air currents. J

A further specific object of the invention is the provision in an apparatus of the sort specified of right and left-hand fans of the disk or screw propeller type constructed and arranged to discharge anequal amount of air, and arranged so that each counterbal- 1 i ances the thrust reaction of the other.

Another object is the provision in an apparatus of the sort specified of a single ino- 'tor,directly connected to the fan wheel shafts in such a manner that the weight of the wheels is not permitted to produce adeflection of the motor shaft or de-centering oi the armature.

A- specific further object of the invention consists in the arrangement of a bypass so that incoming air may be conducted to the fan wheels without entering into contact with a heating medium, to permit eificient operation when ventilation alone is desired.

A further purpose of the invention resides in the arrangement of a pair of inlet openings which communicate with the outside air and the interior of the room, respectively, so that either fresh air or room air, or a mixture of fresh air and room air may be con-,- ducted to the fan wheels.

With these and other objects in. view, which will appear hereinafter, preferred enibodiments of the inventionv are described in the following specification for the purpose of illustration, the scope of the invention being defined in the appended claims. 7

In the annexed drawings:

Fig. 1 is .a sectional elevation of a cabinet constructed in accordance with my invention, the section being taken on line 11 of big. 2,; v

Fig. 2 is a sectional plan view of the im proved cabinet;

Fig. 3 is a perspective view showing the cabinet suspended from the ceiling and ar ranged with gne offthe inlet openings at the upper: endof a window;

Fig. 4 is a sectional elevation of a modified cabinet, the section being taken on line 4Lt of Fig. 5;

Fig. 5 is '3, sectional plan view of the cabinet shown in Fig. 4, and

Fig. 6 is an enlarged view of the motor disclosing the manner of connecting the same 35 to the fan whee'l.

Referring to Figs. 1 to 3, the cabinet, gen erally designated by 1, is arranged at a distance from the. ceiling andv suspended therefrom by rods 2'. The rear end 3 of the cabinet has a rectangular cross-section and is open, sai'dopening usually being arranged .at the upper. portion of a window 4., so that fresh air may enter the casing The rear portion 3 of the cabinet is formed with flanges 5, whereby the cabinet is secured in .place to a wall 6. The top wall 7 of the '9 fora certain length; then slants upwardly,

as at 10, and finally horizontal portion 11.

Slightly above the horizontalportion 9 of the bottom, a false bottom 12 is arranged, which, together with the bottom portion 9, constitutesa bypass 13, for a purpose hereinafter further explained. The false bottom 12 serves to support a plurality of pipe coils terminates in a short or heat radiating elements diagrammatically illustrated at 14:, which are supplied with trance of room air.

15, there being steam by means of the pipes The side walls pipes 16 serving as a return.

of the cabinet at the forward; end of the rear portion 3 incline outwardly, as at 17, and

then pass into parallel portions '18. The iront wall 19 forms a closure for the cabinet.

In conjunction with the inlet opening 20, through which the fresh air enters, an aperture 21 is arranged in thebottom of the rear aperture permits the en- The inlet opening is controlled by a. damper plate 22,-arranged on a spindle 23- A lever24 is secured to the projecting end of the spindle 23 and has 2. depending cord at both ends, so that upon portion. 3, which actuation-or the cord in the proper manner bf permitting fresh am the damper plate22 may be swung into restricting or open position for the purpose or avoiding the ingress of At is arranged carrying a damper plate 26 pro vided for the control of the bottom aper- As will be seen by reference to Fig. 1,

the damper plates 22 and 26 are interconnected by a link 27, the parts being so arranged that when the damper plate 22 is in completely open position, the damper plate 26 completely closes the aperture 21 and vicelversa. At an intermediate position of the plates both openings 20 and 21 are partly closed and sutlicient air may enter through both openings to equal the amount of air which may enter through one of the inlet openings when restricted.

In the bypass 13, PIGVIOUSlY referred. to, a spindle 28 carries a damper plate 29 and a lever 30, fast to the spindle, has at both ends a' depending cord to facilitate the actuation I of the plate-29. The purpose of the damper 'plate 29 consists in permitting or preventing the flow o incoming air through the bypass, as will be hereinafter further described.

At a suitable distance from the heating coils 14, a horizontal shaft 31 is suitably supported in an open frame 32, the shaft carrying at both ends fan wheels 33 and 34: which are preferably, although not neces- 'sarily, Blackman propeller wheels. The

wheels are right and left-hand, and are of a distance to the front of thespindle 23 and below the same, a spindle 251 ncoaees As will be seen! by reference to Figs. 1 and 2, the front wall 19 has an opening closed by the door 40, which, however, is cut away at one corner for the passage of the belt 38. It will be seen that the motor being completely without the cabinet does not interfere with the propulsionot the air currents which, when heated, otherwise might cause an' overheating of the motor. Attenw tion is called to the fact that the outlet openings 35 and 36 in the side walls of the cabinetjare provided with deflectors 41, whereby-the air currents discharged from the propeller wheels are distribute-dover a considerably large space.

The operation of the cabinet is as follows: When heating'ot a room is desired, the plate 22 is actuated to occupy a vertical position so as to close the opening 20 and prevent the ingress of fresh air. The plate 26 then also occupies a vertical position and room air may ingress through the opening 21 and flow past the heating coils 14 to the fans to be discharged thereby'in opposite directions through the side walls of the cabinet. When the room has been heated to the desired capacity and further heating of the air by the heating coils is only necessary to maintain a certain temperature in the room in View of the heat losses through the building it suffices to heat only a portion of the air circulating through the cabinet while the remaining portion may be diverted soas not to contact with the heating coils.

Tn the first instance when heating the room the damper plate is in verticalposition, to force all ofthe air past the coils 14. To merely maintain a reachpd temperature, the damper plate 29 is actuated to afi'ord a passage for the portion of the air through the bypass 13, so that the heated air and unheated air mingle and are discharged by the fans. The cabinet may be used as a ventilating device and to this end both damper plates 22, 26. are arranged horizontally so that the opening 20 permits the ingress of fresh air which is then distributed by the fans. When fresh air to an amount less than the full opening'20-provides is desired, then the plates 22, 26 are arranged in obliue position as shown inFigs. 1 and l, so that simultaneously fresh and room air are drawn in by the negative pressure set up by the fans.

The modification shown in Figs. 4-6 is in substance the same as shown in the principal figures thus far described, with. the diflerence that instead of providing a belt drive for the fan wheels, direct drive is provided for the wheels. To this efi'ect the cabinet has at its forward middle portion, a housing 44 for the reception of a motor 45 which is directly connected to the shafts of cause a deflection of the motor shaft and upon the motor. In this modification also the motor is removed from the path of the air currents. The direct connection of the motorwith the fan wheels would be likely tocontribute'to a rapid deterioration of the motor, as the weight of the fan wheels would a de-centering of the armature.

In order to overcome these objections, the motor shaft is connected tothe fan wheels 5 by means of a hollow tube 46 which at the outer end carries the fan wheels and at the inner end surrounds a bushing 47, arranged motor is contributed to materiallyiby this r from the spirit of the inventiomand'I thereon the shaft. A coupling ring 48 surrounds the tube 46 and a plurality of set screws 49 ensure connection between the tube and the. motor shaft. The hollow tubing forming a flexibly connected extension of the motor shaft prevents vibrations set up by the fan. wheels causing any deterioration of the shaft at the motor bearing. The efficiency of the arrangement of the fans as, due to the fact that the latter exercise equal thrust, their thrust reactionswill counter-balance each other, thereby avoiding any loss of power through end thrust on the fan shaft. The

construction therefore tends to prevent de-' terioration of the operating parts, and in addition the efliciency of the entire apparatus is unusually high by reason of the large space throughout which air currents are pro-' pelled. The modification in other respects is constructed and operates identical with the principal construction, so that no further reference thereto is deemed'necessary.

While the drawings disclose. preferred embodiments of the invention, they are merely indicative of the principle on which the invention is predicated, Various changes and alterations may be made without departing fore do not limit myself to the details exactlyas shown, but want to include all modifications constituting departures within the urview ofthe invention as defined by the following claims a Iclaim: W

1. In an apparatus of the class described, in combination, a cabinet adapted for installation in the. room to be heated, said cabinet being provided with an air inlet opening and with oppositely disposed air outlet 0 enings,

propeller fans journalled in the ca inet in 4 'associatibn with the outlet openings; a radiator housed in the cabinet between the inlet opening and the outlet openings, and a motor site directions,

said outlet openings, a radiator housed in the the county of Cook and N this 7 day of August, 1919.

supported by said cabinet and having opertive connection with said fans wherebythe latter may be actuated to draw air through the radiator and expel it directly into the room through theoutlet openings, said nioside the cabinet.

2.111 an apparatus of the class described,

in combination, a cabinet adapted to be installed in the room to be heated, said cabinet being provided with an air inlet opening and with oppositely disposed air outlet openin s,

propeller fans associated with the outlet? openlngs, a radiator housed in the cabinet between the inlet opening and the outlet openings, a motor supported bythe cabinet substantially co-axially with the fans, and

flexible connections operably joining the into the room in opposite directions, a ra-' diator housed in the cabinet between the inlet opening and the outlet openings, fans mounted in the cabinet at the opposite- 1y discharging outletopenings and adapted I tor being exposed tothe air of the room outp to expel air from thecabinet into the room, 1

means for actuating the fans, and means providing a by-pass withi' whereby air may be diverted around the radiator from the inlet to the fans.

4. In an apparatus of the class described, 1n combination, a cabinet adapted to be in stalled in the room to be heated, said cabinet being ing and with air outlets opening in oppopropeller fans associated with n the cabinet providedmWith' an air inlet opencabinet between' the inlet opening and the outlet" openings, a motor compartment disposed in the cabinet between the propeller fans, said motor compartment being closed to air within the cabinet and open to air outside the cabinet, and a motor housed in said motor compartment and operably connected to the fans, whereby the latter may be actuatedto draw air through the radiator and expel it through the outlet openings.

Signed at 36 West Randolph Street, in State of Illinois,

LAWRENCE PARKER DWYER. 

